Date: Tue, 12 Apr 2005 13:14:49 -0700 From: Julian Elischer <julian@elischer.org> To: Jacob Meuser <jakemsr@jakemsr.com> Cc: freebsd-multimedia@freebsd.org Subject: Re: Anyone working on V4L2 for BSD? Message-ID: <425C2C39.8050607@elischer.org> In-Reply-To: <20050412193149.GA15619@puff.jakemsr.gom> References: <425C18A2.8010807@elischer.org> <20050412193149.GA15619@puff.jakemsr.gom>
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Jacob Meuser wrote: >On Tue, Apr 12, 2005 at 11:51:14AM -0700, Julian Elischer wrote: > > >>I'm considerring it.. It looks quite doable. (assuming we can get >>compatible include files >>without copyright problems.) >> >> > >I can forsee at least one big obstacle in the bktr driver. it is >necessary to call TVTUNER_SETTYPE before setting the tuner, even if >you use TVTUNER_SETFREQ, which is quite different than V4L2. > >there are several bugs lurking in bktr. for example, why are the >U saturation and V saturation ranges different? according to the >datasheets they should be the same. also notice that on startup >bktr reports a U saturation above the supposed limit! > > If you supply fixes.. and others can test them, I can commit them.. I don't have a bktr card. >I'd much rather see the problems fixed than a shim added to it. >how about working about multiple frame buffers? that's probably need >for many V4L2 programs. IMO, it would be better (maybe even easier) >to rewrite bktr with a V4L2 interface than to try to add V4L2 to it. > > I wasn't planning on either, but rather making a v4l2 framework to allow drivers and utilities to hook to each other.. whether the bktr driver gets rewritten or shimmed is an orthogonal question :-) >but, IMO, the best thing would be to fix bktr and document it better. > > anyone who wants to fix or rewrite it is quite welcome to do so.. if it's an improvement, it'll get committed.. I'm interested in webcams at the moment. I want to see if it's possible to make it easier for people to port such things as gnome-meeting (higher rev than the port) so that we can get some real videoconferencing in freeBSD. >some bktr programs -> http://www.jakemsr.com/bsdav/bsdav-1.0.tar.gz > > >
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